Improvement in stem-winding watches



L. EVANS.

Stem-Winding Watches.

'N0.l47,9l8 Patented Feb. 24.1874.

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Witnesses. Inventor. W@ MMM l Y W v 5MM Q@ 'mm/ A Attorneys.

NITED STATES PATENT OFFICE.

LOUIS EVANS, OF PITTSBURG, PENNSYLVANIA.

IMPROVEMENT IN STEM-WINDING WATCHES.

Specification forming part of Letters Patent N0. 147,918, dated February 24, 1874; application filed May 23, 1873.

To alt whom it may concern:

'Be it known that I, LOUIS EVANS, of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Vatches 5 and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawing forming part oi' this speciiicati'on, in which- Figure l is a horizontal section, partlybroken away. Fig. 2 is a vertical section 5 and Figs. 3, 4, and 5 are detail views.

The invention consists in means whereby a watch may be either wound or set from the pendant or the winding-post, as hereinafter fully described, and then pointed out in the claims.

In the drawing, A represents a bevel-wheel, gearing with a corresponding wheel on the winding-post B, having its large end set in plates', and its stem extending out into the pendant of the wat-ch, as shown in the drawing. rlhis enables the watch to be set or wound either from pendant or winding-post.

C is a wheel, with a shoulder on its upper and a ratchet on its lower side, is hollow, and lits on the winding-post B, its shoulder resting against the bevel-wheel. hen ont of contact with a ratchet on the wheel D, it turns freely itself, and allows the post to be turned in it. The teeth of wheel C mesh into those et' barrel H, and when those on the lower side of wheel G come into contact with those on the upper side of subjacent wheelD, which is iitted rigidly on winding-post and held by a spring, E, the post B may be turned together with the barrel, and the mainspring wound up. If the post is turned in a contrary direction, no harm is done, as the ratchets will slip over one another. F is the barrel-arbor, having the main wheel rigidly attached thereto, and G is the mainspring-arbor, which screws to the former after the barrel is slipped on. The arbor G has a hook on its edge, which catches the inner end of mainspring, and is hooked at the outer end to barrel I-I, which has on its rim the teeth that connect with wheel G. By this arrangement of parts, the barrel lies back freely when the mainspring breaks, and the strain is thrown backwardly upon the ratchet at C, allowing it to slip, and the force of the mainspring to be spent without injury to any part of the movement. This barrel is adapted to any kind of watch. I is a detent, ,which acts against the teeth of barrel H while the spring is being wound np. K is a screw in the upper plate, made with a long point, extending down to the detent I, and serving to hold the latter in place. J is a lever extending out beyond the plates, and fastened to the inside of dial-plate by a screw, on which it is movable back and forth. The inner end of lever J, is wedge-shaped, and, when the outer end is thrown back, passes between the wheel C and the flange on wheel D, thus separating said wheels, `and bringing wheel D into gear with dial-wheel L. This allows the hands to be set by means ofthe winding-post, and without interfering with the barrel.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is- Y l. The winding-post B, wheels A C D, and barrel H, combined as and 'for the purpose described.

2. The lever J combined with the wheels C D, post B, and dial-wheel L, as and for the purpose described.

LGUIS EVANS.

Vitnesses W. H. H. ALGEO, J oHN STEvnNsoN. 

